Im having the crash too now, but im not sure if i broke anything before, actually.
Im seeing double folders of everything in the engine directories... ahem.
But anyway, a few questions about Ai grid.
I applied it once after i already changed a lot of terrain, made canyons, mountains, etc - then applied the grid. It applied looking like aproximately correct patches of green and red areas, but it would be necessary to add more smaller paths with the painting tool, which seemed to work.
SO im guessing the same happens if you do it early, then reload level (and it works) - then you go altering terrain and the Ai grid is changing with it - right?
And then you have to add more handpainted paths as necessary?
just checking...